Question to the Department for Work and Pensions:

To ask the Secretary of State for Work and Pensions, how many people in (a) Cardiff and (b) Vale of Glamorgan have made successful claims for underpayments of universal credit since the beginning of the roll-out; and what the average value is of each such claim.

DWP only holds this data at a national level for estimated underpayments, which can be accessed at:

https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/762141/fraud-and-error-stats-release-2017-2018-final-estimates.pdf